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以下代碼創建2個按鈕點擊的選項卡,但不顯示任何內容。我仍然在學習這一點,並想知道錯誤是什麼。使用不同的內容動態創建2個選項卡wpf
背後
public void button2_Click(object sender, RoutedEventArgs e)
{
popUp1.IsOpen = false;
Canvas canvas4 = new Canvas();
ScrollViewer viewer4 = new ScrollViewer();
viewer4.Content = canvas4;
string txtfl = File.ReadAllText(textBox1.Text);
TextBlock txbl1 = new TextBlock();
txbl1.Text = txtfl;
canvas4.Children.Add(txbl1);
TabItem newTab1 = new TabItem();
newTab1.Header = "Text File";
newTab1.Content = viewer4;
tabctrl1.Items.Add(newTab1);
tabctrl1.SelectedItem = newTab1;
Brush br = new SolidColorBrush(Colors.White);
Canvas canvas2 = new Canvas();
canvas2.Background = br;
ScrollViewer viewer2 = new ScrollViewer();
viewer2.Content = canvas2;
TabItem newTab2 = new TabItem();
newTab2.Header = "Test";
newTab2.Content = viewer2;
tabctrl1.Items.Add(newTab2);
}
TabControl的代碼使用XAML
XAML
<Window ... >
<Grid>
<Popup Name="popUp1" Width="500" Height="300" Placement="Center" IsEnabled="False" IsOpen="False">
<Canvas x:Name="myCanvas1" Width="500" Height="300" Visibility="Visible">
<Button Content="Button" Height="38" HorizontalAlignment="Left" Margin="12,71,0,0" Name="button1" VerticalAlignment="Top" Width="151" Click="button2_Click" />
</Canvas>
</Popup>
<TabControl Name="tabctrl1" Width="1345" Height="28" Margin="0,24,0,0" HorizontalAlignment="Left" VerticalAlignment="Top" BorderThickness="2">
<TabControl.Background>
<LinearGradientBrush EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#FF3A60AD" Offset="0.528"/>
<GradientStop Color="#FF6A85D8" Offset="0.01"/>
</LinearGradientBrush>
</TabControl.Background>
</TabControl>
</Grid>
</Window>
提供畫布的高度和寬度。然後看看會發生什麼。 –
對XAML元素進行編碼時,通常最好先用圖形編輯器進行編輯,然後查看需要包含在元素中的屬性。 –
如果你正在學習WPF,我會建議你完全忘記你之前有關構建UI和使用適當方式的知識。您正在創建代碼隱藏的所有內容,您最好使用XAML。如果你發佈你的tabctrl1來自哪裏,這將會有所幫助。像Snoop這樣的工具也是學習WPF如何構建和佈局控件的好方法。 – dowhilefor